100th Window is the fourth studio album from Massive Attack, released in February 2003. It contains 10 tracks, including a hidden instrumental track (LP4). It was written and produced by Robert Del Naja and Neil Davidge, with three tracks co-written with Sinead O'Connor (What Your Soul Sings, Special Cases and A Prayer for England), who also took on lead vocals on the three tracks. Robert Del Naja was otherwise main vocalist, with Horace Andy taking lead vocals on two tracks (Everywhen and Name Taken). Damon Albarn performed backing vocals on Small Time Shot Away.